Section 096-691-10 - Regulation of airport hydrant systemsA.Applicability(1) This section applies to all airport hydrant systems that are part of an underground oil storage facility which fuels aircraft and operates under high pressure with large diameter piping that typically terminates into one or more hydrants.(2) Underground tanks storing aviation fuel must comply with section 5 or 8, as applicable. NOTE: Owners and operators of airport hydrant systems should also review section 13 for additional requirements for any associated aboveground oil storage tanks.
B.Design, construction and installation requirements for new and replacement systems(1) General design and construction requirements(a) Bare steel and asphalt coated steel piping are prohibited.(b) All new and replacement steel piping in contact with soil or water must be cathodically protected and coated with a suitable dielectric material. The cathodic protection system must be designed by a corrosion expert to adequately protect all parts of the piping system from corrosion by maintaining a negative structure to soil potential of at least 0.85 volts. Cathodic protection systems shall be designed in accordance with NACESP 0285.(c) Piping must be designed by a professional engineer in compliance with Maine professional regulation statutes, and constructed in accordance with American National Standards Institute (ANSI) standard for "Chemical Plant and Petroleum Refinery Piping", ANSI/ASME B 31.1.(d) In addition to the requirements and codes of practices listed in this section, owners and operators may use the military construction criteria, Unified Facilities Criteria (UFC) 3-460-01, Design: Petroleum Fuel Facilities when designing, constructing, and installing airport hydrant systems.(2) Leak detection. All new and replacement airport hydrant piping routinely containing oil must be provided with secondary containment and continuous interstitial space monitoring.(3) General installation requirements (a) No new or replacement airport hydrant piping may be installed unless the facility and piping have been registered in accordance with section 4. (b) New and replacement airport hydrant piping must be installed according to good engineering practices using welded joints and under the supervision of a professional engineer licensed in Maine or otherwise working in compliance with 32 M.R.S. §§1351 - 1362. The engineer shall be responsible for surveillance of all phases of installation. Installation plans must be submitted for Department review and approval at least 60 days prior to new or replacement piping registration and must include at a minimum: (i) Secondary containment and leak detection installation details;(ii) Excavation and backfill specifications;(iii) Pipe material specifications;(iv) Welding specifications; and(v) Cathodic protection system installation.(c) Installation of the cathodic protection system must be supervised by a corrosion expert.(d) If airport hydrant piping is replaced, any underground oil storage tank not constructed of fiberglass, cathodically protected steel, or other Commissioner approved noncorrosive materials in conformance with sections 5 or 8 must be replaced at the same time.(e) New and replacement piping must be installed in accordance with NACE International SP 0285, NACE International SP 0169 or ANSI/ASME B31.3.(f) Welded joints must be radiograph inspected.(g) Hydrant pits must be liquid tight and must drain to an oil water separator, or other Commissioner approved collection and treatment system.(h) Certification of installation. Owners of new and replacement facilities shall ensure that the project engineer certifies to the Commissioner, within 30 days of completion of installation, that the facility materials, design and installation meet the requirements of this Chapter. This certification must be provided in writing on a form provided by the Commissioner.(i) After July 1, 2019, a Certified Underground Oil Storage Tank Installer overseeing a tank removal must be trained in best management practices for erosion and sedimentation control by the Department or through an equivalent program approved by the Department.C.Retrofitting requirements for existing airport hydrant systems(1) Existing airport hydrant systems without secondary containment and interstitial space monitoring or another form of leak detection in compliance with section 5(B)(2), shall retrofit or implement one of the following leak detection methods by December 1, 1991:(a) An annual hydrostatic test of the entire piping line conducted at 150 percent of maximum design operating pressure, or maximum transient surge pressure, whichever is greater. Test shall be conducted for a minimum of four (4) hours and otherwise in accordance with API Recommended Practice 1110, "Pressure Testing of Liquid Petroleum Pipelines".(b) Other leak detection systems approved by the Commissioner that can reliably detect a loss of at least 40 gallons per day.(2) Existing airport hydrant systems constructed of steel may retrofit corrosion protection in accordance with 38 M.R.S. §563-A(l-A) as an alternative to abandonment or replacement, provided a corrosion induced leak has not occurred and the system is not located in a sensitive geological area. To be eligible for this exemption, the facility owner or operator must demonstrate to the Commissioner's satisfaction that the airport hydrant piping system does not leak. The test utilized to determine system integrity must be able to determine a leak rate of at least 40 gallons per day and that any leaks are not directly or indirectly due to corrosion. Cathodic protection must be designed by a corrosion expert and installed in accordance with the standards of section 10(B) above. Leak detection must be retrofitted at the same time cathodic protection is retrofitted.D.Operation, maintenance, testing and inspection requirements for new, replacement and existing systems(1) Airport hydrant systems must be operated in accordance with section 5(D), except that the requirements of 5(D)(1) and (2) do not apply.(2) Repairs of new, replacement and existing piping must be in accordance with good engineering practice and under the surveillance of a Maine professional engineer. Upon completion, the repaired section must be tested for leaks and for proper operation of the cathodic protection system. A report describing the repairs made and test results must be submitted by the owner or operator to the Commissioner for approval.(3) Annual inspection requirements. The owner shall conduct an annual facility compliance inspection and correct any deficiencies found in accordance with section 5(D)(17).(4) The owner shall have designated, trained and certified operators as set forth in Operator Training for Underground Oil and Hazardous Substance Storage Facilities, 06-096 C.M.R. ch. 693.(5) The owner or operator must ensure that a certified A/B operator inspects the facility for compliance in accordance with the schedule below. The owner or operator must maintain a log of these inspections in accordance with section 5(D)(16) and in accordance with 06-096 C.M.R. ch. 693, § 5. The log must include a list of each area checked, whether each area checked was acceptable or needed action taken, and a description of actions taken to correct an issue. The inspections must at a minimum check the following equipment on a weekly, monthly and annual basis as applicable: (a) Weekly check of spill prevention equipment including spill buckets --visually check for damage; remove liquid or debris; check for and remove obstructions in the fill pipe; check the fill cap to make sure it is securely on the fill pipe;(b) Weekly check of leak detection equipment -- check to make sure the release detection equipment is operating with no alarms or other unusual operating conditions present; and ensure records of leak detection testing are reviewed and current;(c) Monthly check of double walled spill buckets with interstitial monitoring -- check for a leak in the interstitial area;(d) Monthly check of hydrant pits and hydrant pit vaults that do not require a confined space entry permit per the Occupational Safety and Health Administration (OSHA) -- to visually check for any damage or leaks, and remove any liquid or debris;(e) Annual check of hydrant pits and hydrant pit vaults if a confined space entry permit is required per the Occupational Safety and Health Administration (OSHA) --to visually check for any damage or leaks, and remove any liquid or debris; and(f) Annual check of containment sumps by a Maine Certified Underground Oil Storage Tank Installer or Inspector --visually check for damage, leaks to the containment area, or releases to the environment; remove liquid in contained sumps or debris; and for double walled sumps with interstitial monitoring, check for a leak in the interstitial area.E.Closure and abandonment. Closure and abandonment of airport hydrant piping systems must be in accordance with section 11. 06- 096 C.M.R. ch. 691, § 10